Triple Damage will often be overkill, but reducing the cost of the effect goes a long way to making it worth it
Instead, this archetype dovetails nicely with the U/W artifact value theme by spitting out tons of Treasures, Clues and Food alongside the occasional creature token
You can also pay 3 mana to create an enchantment creature with power/toughness equal to your experience counters
Pariah on an opponents creature usually turns into Fog + Doom Blade, which is a pretty solid Plan B when you cant find your own indestructible creature to put it on
Finally, we have the creature suite
Ezrim, Agency Chief Stern, humorless, and uncompromising, Ezrim is the archon who leads the Ravnican Agency for Magicological Investigations